An item was originally priced at $6, but you used a coupon and bought it for $4.80. What percent was the coupon you used?
2 answers:
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The equation for a parabola with vertex (h, k) and vertical scale factor "a" is
y = a(x -h)² + k
One parabola with vertex (6, 9) is
y = (x-6)² +9
y = a(x -h)² + k
One parabola with vertex (6, 9) is
y = (x-6)² +9